5种茶园秋冬季天敌与假眼小绿叶蝉空间关系密切程度的差异

Abstract

为了明确与假眼小绿叶蝉空间关系密切的天敌种类，为合理利用和保护天敌提供科学依据。运用地学统计学分析方法计算白毫早茶园、黄山大叶种茶园、农抗早茶园、平阳特早茶园和乌牛早茶园秋冬季假眼小绿叶蝉和其主要6种天敌地统计学半变异函数的变程。使用灰色系统分析方法对计算结果进行灰色关联度分析，并对分析结果进行标准化。以标准化后的密切指数大小评判天敌与假眼小绿叶蝉空间关系的密切程度。结果是：1）、黄山大叶种茶园和农抗早茶园与假眼小绿叶蝉空间关系密切的前3位天敌是粽管巢蛛、鳞纹肖蛸和斜纹猫蛛，但位次不同。2）、白毫早茶园前3位天敌是鳞纹肖蛸、斜纹猫蛛和锥腹肖蛸，前2种与黄山大叶种和农抗早茶园相同。3）、平阳特早茶园前3位天敌是鳞纹肖蛸、粽管巢蛛和草间小黑蛛，前2种与黄山大叶种和农抗早茶园相同。4）、乌牛早茶园前3位天敌是粽管巢蛛、草间小黑蛛和三突花蟹蛛，只有粽管巢蛛与黄山大叶种和农抗早茶园相同。根据5种茶园同种天敌密切指数之和以及同种天敌位次之和评判，与假眼小绿叶蝉空间关系密切的天敌均是鳞纹肖蛸、粽管巢蛛和斜纹猫蛛。天敌位次的变化主要是害虫和天敌数量之比的比值变化。害虫个体数与某种天敌个体数之比的比值越小，天敌与害虫的跟随关系则越密切。密切原因与食饵资源短缺有关。;In order to clarify the types of natural enemies that are closely related in Empoasca vitis at space, and to provide scientific basis for rational use and protection of natural enemies. Therefore we here use geostatistics analysis method to calculate the statistics of semivariogram of Empoasca vitis and its main 6 natural enemies in Baihaozao Tea Garden, Huangshan large-leaf Tea Garden, Nongkangzao Tea Garden, Pingyangtezao Tea Garden, and Wuniuzao Tea Garden in autumn and winter. We firstly use the gray system analysis method to analyze the gray correlation degree of the calculation results, and then used the analysis results are standardized. The standardized closeness index is used to judge the closeness of the spatial relationship between natural enemies and Empoasca vitis. The result is that:1) the top three natural enemies that are closely related to the Empoasca vitis in Huangshan large-leaf Tea Garden and Nongkangzao Tea Garden are the Clubiona japonicola, Tetragnatha squamata, and Oxyopes sertatus, but they have different orders. 2) The top three natural enemies of Baihaozao Tea Garden are the Tetragnatha squamata, Oxyopes sertatus, and Tetragnatha maxillosa. The first two species of natural enemies are the same as the Huangshan large-leaf Tea Garden and Nongkang Zao Tea Garden. 3) The top three natural enemies of Pingyangtezao Tea Garden are Tetragnatha squamata, Clubiona japonicola, and Erigonidium graminicolum. The first two species of natural enemies are the same as Huangshan large Leaf Tea Garden and Nongkang zao Tea Garden. 4) The top three natural enemies of Wuniuzao Tea Garden are Clubiona japonicola, the Erigonidium graminicolum and Misumenops tricuspidatus. Among the six dominant species of natural enemies, only the Clubiona japonicola is the same as Huangshan large-leaf Tea Garden and Nongkangzao Tea Garden natural enemy species. According to the sum of the close indices of the natural enemies' species in the five tea gardens and the ranking of the same species of natural enemies, the natural enemies closely related to the Empoasca vitis are all the Tetragnatha squamata, Clubiona japonicola and Oxyopes sertatus. After our investigation and research, we came to the conclusion that the change in the ranking of natural enemies is mainly caused by the change in the ratio of the number of pests to natural enemies. The smaller ratio of the number of individual pest to the number of individual natural enemy, the closer of follow-up relationship between natural enemies and pests is. The close reason is related to the shortage of bait resources.